Mr Davis could take the reigns for a few months to ensure Brexit is properly delivered, Tories are speculating

Boris Johnson's is being urged to park his leadership ambitions until after Brexit is done and dustedBoris has been bombard with supportive messages from MPs since he quit over Brexit last month, his friends say.

One senior Tory predicted Mrs May could face a leadership challenge as early as next month, when MPs return from their summer break.

The source said: "The membership is massively behind Boris on this. If there weren’t enough Tory MPs ready to support no-confidence letters when we left Westminster last month, there probably will be now."

It requires 38 Tories to write a letter saying they have no confidence in her to trigger a ballot, but then half of the whole Parliamentary group have to vote to oust her to trigger a leadership battle.